Receiver for electrical oscillations.



PAIENTED JULY 2, 1 07. P. 0. 123113113351. RECEIVER FOR ELECTRICALoscummous.

. APPLICATION FILED JUNE 28,1906.

- [n venZ'or: Peder Q Redersen.

. t7.- TED STATES I PEDER PEDER S EN, OF COPENHAGEN, DENMARK;

nnonrvnn non nLEormcAL OSCILLATIONS.

Specification of Letters Patent.

Patented J lly 2, 1907.

Application filed June 28,1906. s rial No- 323,904.

' of apparatus has been proposed in which continuous rather thanintermittent oscillations are emanatedfrom the transmitting station.With this system a'practical'difficnlty arises on account of the'factthat the ordinary types of wave indicator do not possess a well definedresistance so that their presence in the circuit of vibrations impedesthe correct tuning or resonance which would otherwisd be secured. Thismay be vercome by arranging thereceiver system so that the detector orwave indicator is only intermittently connected to the circuit ofvibration. In tlie present application I have described and claimed anapparatus for securing this result.

Inaddition to the advantage that the wave indicator is onlyintermittently connected with the circuit of vibration, the presentinvention also attains the further advantage that the energy of thecurrent of vibration is transformed into a higher potential and at-thedesired moment is impelled through the wave indicator in the form of anaccumulated charge. Both of these conditions contribute considerablytoward increasing the sensitiveness of the receiver.

In the drawings, Figure 1 is a diagrammatic view showing the receivingcircuit'of wireless system em-' bodying the principles of my invention.Fig. 2 is a similar view'showing a slight modification. Fig. 3 shows anadditional modification. Figs. 4, 5 and 6 show still further modifiedforms of the invention.

In the form of the invention shown in Fig. l adenotes a reactance coiland b a condenser, which together form the circuit of vibration for thereceived wireless impulses. 0 denotes a contact device or circuitinterrupting key. This key or contact device is bridged by a detector fof any ordinary or approved construction. The antenna and the earthcontacts are respectively made at d and e. I

i If the contact 0 is closed, vibrations will occur in the circuit ofvibration whenever the antenna intercepts the electric waves or wirelessimpulses. The electric currents of vibration in this antenna circuitwill resonate with the wireless impulses and increase to a highintensity or amplitude. At this moment the contact c is interruptedwhich decreases the capacity of the system, and atthe same time the waveindicator is thrown into the circuit 'and powerfully acted upon. Thisaction on the detector or wave indicator is power-| 'ful, partly onaccount of. the heavy currents obtained by the effect of resonance asabove mentioned, and partly on account of the increase in the potential,due to the decrease in the capacity of 'the system, which results fromopening the contact 0.

In the diagram shown in Fig. 2, the electric vibrations are induced froma primary winding h to a secondar'y coil g, which together with thecondenser b, vforms the circuit of vibration.

In the form of the invention shown combination of the forms of theinvention shown in Figs. 1 and 2 is effected. In this case the reactancea is made part of an auto-coil.

In the form oi the invention shown in Fig. 4 the reactance coil isdivided into two parts 70 and l by the contact device 0. This produces aperfectly s ynnnetrical arrangement.

in Fig. 3 a virtual Figs. 5 and 6 show how the relay circuit may'be ad-1 vantageously arranged. The relay is indicated at. R and the battery atB. With the form of arrangement shown in Fig. 5-the relay circuitis notclosed through the contact 0 on account of the condenser m.

Fig. 6 shows a contact device 0 arranged in such a manner that at oneposition of its throw it closes the circuit of vibration and opens suchcircuit at another position, after which it can close connection with awave indicator so that this is actuated by the circuit of vibrationchanged in the manner stated above.

What I claim is:

A receiving apparatus for a wireless system comprisinga circuit ofvibrationhaving inductance and capacity therein, said circuit having acontact device adapted to close the circuit of vibration directly at oneposition of its 'throw, and'a divided circuit including a wave indicatorand adapted to be included in the circuit at the other position of throwon said contact device.

In witness whereof, I subscribe by signature, in the presence of twowitnesses.

. PEDER OLUF PEnnicsnN.

Witnesses Cacrr. VILHELM SCHON, VIGGO BLOM

